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The velocity of a boat X relative to a b...

The velocity of a boat X relative to a boat Y is ` 5 hati - 2 hatj` and that of Y relative to another boat Z is `9 hati + 4 hatj` where ` hati and hatj` are the velocity of knot per hour, east and north respectively. Then the velocity is :

A

a) `(sqrt2)/(10)` knot/h

B

b) `(10)/(sqrt2)` knot/h

C

c) `10 sqrt2` knot/h

D

d) `2 sqrt10` knot/h

Text Solution

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The correct Answer is:
C
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